package com.npr.controller;

import com.npr.entity.*;
import com.npr.event.EventProducer;
import com.npr.service.CommentService;
import com.npr.service.DiscussPostService;
import com.npr.service.LikeService;
import com.npr.service.UserService;
import com.npr.util.CommunityConstant;
import com.npr.util.CommunityUtil;
import com.npr.util.HostHolder;
import com.npr.util.RedisKeyUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.*;

@Controller
@RequestMapping("/discuss")
public class DiscussPostController implements CommunityConstant {
    @Autowired
    private DiscussPostService discussPostService;
    @Autowired
    private HostHolder hostHolder;
    @Autowired
    private UserService userService;
    @Autowired
    private CommentService commentService;
    @Autowired
    private LikeService likeService;
    @Autowired
    private EventProducer eventProducer;
    @Autowired
    private RedisTemplate redisTemplate;
    @RequestMapping(path = "/add",method = RequestMethod.POST)
    @ResponseBody
    public String addDiscussPost(String title,String content){
        User user = hostHolder.getUser();
        if(user == null){
            return CommunityUtil.getJSONString(403,"你还没有登录");
        }
        DiscussPost post = new DiscussPost();
        post.setUserId(user.getId());
        post.setTitle(title);
        post.setContent(content);
        post.setCreateTime(new Date());
        discussPostService.addDiscussPost(post);
        //触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(user.getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(post.getId());
        eventProducer.fireEvent(event);
        //计算帖子分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey,post.getId());
        //报错的情况将来统一处理
        return CommunityUtil.getJSONString(0,"发布成功!");
    }
    @RequestMapping(path="/detail/{discussPostId}",method = RequestMethod.GET)
    public String getDiscussPost(@PathVariable("discussPostId") int discussPostId, Model model, Page page){
        //帖子
        DiscussPost post = discussPostService.findDiscussPostById(discussPostId);
        model.addAttribute("post",post);
        //作者
        User user = userService.findUserById(post.getUserId());
        model.addAttribute("user",user);
        //点赞数量
        long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST,discussPostId);
        model.addAttribute("likeCount",likeCount);
        //点赞状态
        int likeStatus = hostHolder.getUser()==null?0:
                likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_POST,discussPostId);
        model.addAttribute("likeStatus",likeStatus);
        //评论分页信息
        page.setLimit(5);
        page.setPath("/discuss/detail/"+discussPostId);
        page.setRows(post.getCommentCount());
        //评论：给帖子的评论
        //回复：给评论的评论
        //评论列表
        List<Comment> commentList = commentService.findCommentsByEntity(
          ENTITY_TYPE_POST,post.getId(), page.getOffset(), page.getLimit()
        );
        //评论VO列表，VO是viewObject的意思，就是页面要显示的对象
        List<Map<String,Object>> commentVoList = new ArrayList<>();
        if(commentList!=null){
            for(Comment comment : commentList){
                //评论VO
                Map<String ,Object> commentVo = new HashMap<>();
                //评论
                commentVo.put("comment",comment);
                //作者
                commentVo.put("user",userService.findUserById(comment.getUserId()));
                //点赞数量
                likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT,comment.getId());
                commentVo.put("likeCount",likeCount);
                //点赞状态
                likeStatus = hostHolder.getUser()==null?0:
                        likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_COMMENT,comment.getId());
                commentVo.put("likeStatus",likeStatus);
                //回复列表
                List<Comment> replyList =commentService.findCommentsByEntity(
                        ENTITY_TYPE_COMMENT,comment.getId(),0,Integer.MAX_VALUE
                );
                //回复VO列表
                List <Map<String,Object>> replyVoList = new ArrayList<>();
                if(replyList!=null){
                    for(Comment reply : replyList){
                        Map<String,Object> replyVo = new HashMap<>();
                        //回复
                        replyVo.put("reply",reply);
                        //作者
                        replyVo.put("user",userService.findUserById(reply.getUserId()));
                        //回复目标
                        User target = reply.getTargetId() == 0?null:userService.findUserById(reply.getTargetId());
                        replyVo.put("target",target);
                        replyVoList.add(replyVo);
                        //点赞数量
                        likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT,reply.getId());
                        replyVo.put("likeCount",likeCount);
                        //点赞状态
                        likeStatus = hostHolder.getUser()==null?0:
                                likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_COMMENT,reply.getId());
                        replyVo.put("likeStatus",likeStatus);
                    }
                }
                commentVo.put("replys",replyVoList);
                //回复数量
                int replyCount = commentService.findCommentCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("replyCount",replyCount);

                commentVoList.add(commentVo);
            }
        }
        model.addAttribute("comments",commentVoList);
        return "/site/discuss-detail";
    }
    //置顶
    @RequestMapping(path = "/top",method=RequestMethod.POST)
    @ResponseBody
    public String setTop(int id){
        discussPostService.updateType(id,1);
        //触发发帖事件
        Event event =new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);
        return CommunityUtil.getJSONString(0);
    }
    //加精
    @RequestMapping(path = "/wonderful",method=RequestMethod.POST)
    @ResponseBody
    public String setWonderful(int id){
        discussPostService.updateStatus(id,1);
        //触发发帖事件
        Event event =new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);
        //计算帖子分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey,id);
        return CommunityUtil.getJSONString(0);
    }
    //删除
    @RequestMapping(path = "/delete",method=RequestMethod.POST)
    @ResponseBody
    public String setDelete(int id){
        discussPostService.updateStatus(id,2);
        Event event =new Event()
                .setTopic(TOPIC_DELETE)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);
        return CommunityUtil.getJSONString(0);
    }
}
